loaf of bread vs loaf

loaf of bread and loaf both are nouns.

Word	Noun	Adjective	Verb	Adverb
loaf of bread	Yes	No	No	No
loaf	Yes	No	Yes	No

As nouns, loaf of bread and loaf are synonyms defined as:

loaf of bread and loaf: a shaped mass of baked bread that is usually sliced before eating

loaf of bread (noun)	loaf (noun)
a shaped mass of baked bread that is usually sliced before eating	a shaped mass of baked bread that is usually sliced before eating
	a quantity of food (other than bread) formed in a particular shape

loaf of bread (verb)	loaf (verb)
	be about a place without any apparent purpose
	be lazy or idle